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Blower compartment
Dirt and lint can create excessive loads on the motor
resulting in higher than normal operating temperatures
and shortened service life. It is recommended that the
blower compartment be cleaned of dirt or lint that may
have accumulated in the compartment or on the blower
and motor as part of the annual inspection.
Blower Fan Wheel
Inspect the blower wheel blades for accumulations of dirt
and clean if necessary. Inspect mounting nut for tightness
when done.
Blower Motor & Assembly
Inspect the blower assembly and motor mounting
brackets for tightness and corrosion. Correct deficiencies
if necessary. The blower motor contains sealed bearings
and under normal operating conditions, no maintenance
is necessary for the life of the equipment.
RED LED
OFF
Flash
ON
table 6. Air handler control Board Fault conditions
Circuit
Breaker (60A)
Upper Door
Assembly
Lower Door
Assembly
12
DIAGNoStIc
Control Fault (No Power)
Blower Fault
Normal Operation
Motor Control
Board
Blower
Control
Wheel
Board
Blower
Housing
Figure 8. B6BV Series Air Handler components
tRouBLESHootING
If the air handler fails to operate, check the following:
• Is the electric turned on?
• Is the thermostat operating properly?
• Are the blower compartment door(s) in place?
• Is the air handler disconnect closed?
• Has the circuit breaker tripped or the control board fuse
burned open?
• Are any manual reset switches open?
• Is the filter dirty or plugged?
• Is the red LED on the air handler control board constantly
ON? If not, use Table 6 to determine fault condition.
• Is the green and red LED on the motor control board
constantly ON? If not, use Table 7 to determine fault
condition.
DIAGNoStIc
Control Fault (No Power)
Normal Operation
Fixed
Speed
Motor Fault
Furnaces
Twin Fault (no motor fault)
Communications Fault
table 7. Motor control Board Fault conditions
Heating Element
Assembly
Transformer
Capacitor
Motor
Mount Kit
Blower
Motor
GREEN
RED
LED
LED
Off
Off
On
On
On
Flash
Flash
On
Flash
Flash
Filter
Door
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